Table 1 Steam pretreatment conditions
Substrate | Spruce | Wheat straw | Bagasse |
|---|---|---|---|
Size (mm) | 2–10 | 2–10 | Not determined |
Prior to pretreatment | Impregnated with 2.5% SO2 (w/w moisture) | Soaked in 0.2% H2SO4 solution (20 g solution/g dry straw) | Impregnated with 2% SO2 (w/w moisture) |
Pretreatment temperature (°C) | 210 | 190 | 200 |
Pretreatment time (min) | 5 | 10 | 5 |